Merge tag 'v3.12-rc5' into stable/for-linus-3.13

Linux 3.12-rc5

Because the Stefano branch (for SWIOTLB ARM changes) is based on that.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

* tag 'v3.12-rc5': (550 commits)
  Linux 3.12-rc5
  watchdog: sunxi: Fix section mismatch
  watchdog: kempld_wdt: Fix bit mask definition
  watchdog: ts72xx_wdt: locking bug in ioctl
  ARM: exynos: dts: Update 5250 arch timer node with clock frequency
  parisc: let probe_kernel_read() capture access to page zero
  parisc: optimize variable initialization in do_page_fault
  parisc: fix interruption handler to respect pagefault_disable()
  parisc: mark parisc_terminate() noreturn and cold.
  parisc: remove unused syscall_ipi() function.
  parisc: kill SMP single function call interrupt
  parisc: Export flush_cache_page() (needed by lustre)
  vfs: allow O_PATH file descriptors for fstatfs()
  ext4: fix memory leak in xattr
  ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc"
  ALSA: hda - Sony VAIO Pro 13 (haswell) now has a working headset jack
  ALSA: hda - Add a headset mic model for ALC269 and friends
  ALSA: hda - Fix microphone for Sony VAIO Pro 13 (Haswell model)
  compiler/gcc4: Add quirk for 'asm goto' miscompilation bug
  Revert "i915: Update VGA arbiter support for newer devices"
  ...

11 files changed, 64 insertions, 38 deletions

diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 58b7d14b08ee..08cc08f037a6 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -107,7 +107,8 @@ static void check_idle_worker(struct btrfs_worker_thread *worker)
                 worker->idle = 1;
 
                 /* the list may be empty if the worker is just starting */
-                if (!list_empty(&worker->worker_list)) {
+                if (!list_empty(&worker->worker_list) &&
+                    !worker->workers->stopping) {
                         list_move(&worker->worker_list,
                                  &worker->workers->idle_list);
                 }
@@ -127,7 +128,8 @@ static void check_busy_worker(struct btrfs_worker_thread *worker)
                 spin_lock_irqsave(&worker->workers->lock, flags);
                 worker->idle = 0;
 
-                if (!list_empty(&worker->worker_list)) {
+                if (!list_empty(&worker->worker_list) &&
+                    !worker->workers->stopping) {
                         list_move_tail(&worker->worker_list,
                                       &worker->workers->worker_list);
                 }
@@ -412,6 +414,7 @@ void btrfs_stop_workers(struct btrfs_workers *workers)
         int can_stop;
 
         spin_lock_irq(&workers->lock);
+        workers->stopping = 1;
         list_splice_init(&workers->idle_list, &workers->worker_list);
         while (!list_empty(&workers->worker_list)) {
                 cur = workers->worker_list.next;
@@ -455,6 +458,7 @@ void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max,
         workers->ordered = 0;
         workers->atomic_start_pending = 0;
         workers->atomic_worker_start = async_helper;
+        workers->stopping = 0;
 }
 
 /*
@@ -480,15 +484,19 @@ static int __btrfs_start_workers(struct btrfs_workers *workers)
         atomic_set(&worker->num_pending, 0);
         atomic_set(&worker->refs, 1);
         worker->workers = workers;
-        worker->task = kthread_run(worker_loop, worker,
-                                   "btrfs-%s-%d", workers->name,
-                                   workers->num_workers + 1);
+        worker->task = kthread_create(worker_loop, worker,
+                                      "btrfs-%s-%d", workers->name,
+                                      workers->num_workers + 1);
         if (IS_ERR(worker->task)) {
                 ret = PTR_ERR(worker->task);
-                kfree(worker);
                 goto fail;
         }
+
         spin_lock_irq(&workers->lock);
+        if (workers->stopping) {
+                spin_unlock_irq(&workers->lock);
+                goto fail_kthread;
+        }
         list_add_tail(&worker->worker_list, &workers->idle_list);
         worker->idle = 1;
         workers->num_workers++;
@@ -496,8 +504,13 @@ static int __btrfs_start_workers(struct btrfs_workers *workers)
         WARN_ON(workers->num_workers_starting < 0);
         spin_unlock_irq(&workers->lock);
 
+        wake_up_process(worker->task);
         return 0;
+
+fail_kthread:
+        kthread_stop(worker->task);
 fail:
+        kfree(worker);
         spin_lock_irq(&workers->lock);
         workers->num_workers_starting--;
         spin_unlock_irq(&workers->lock);
diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h
index 063698b90ce2..1f26792683ed 100644
--- a/fs/btrfs/async-thread.h
+++ b/fs/btrfs/async-thread.h
@@ -107,6 +107,8 @@ struct btrfs_workers {
 
         /* extra name for this worker, used for current->name */
         char *name;
+
+        int stopping;
 };
 
 void btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work);
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 70681686e8dc..9efb94e95858 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -535,10 +535,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
         list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list);
 
         btrfs_rm_dev_replace_srcdev(fs_info, src_device);
-        if (src_device->bdev) {
-                /* zero out the old super */
-                btrfs_scratch_superblock(src_device);
-        }
+
         /*
          * this is again a consistent state where no dev_replace procedure
          * is running, the target device is part of the filesystem, the
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4ae17ed13b32..62176ad89846 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1561,8 +1561,9 @@ int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
         return ret;
 }
 
-struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
-                                              struct btrfs_key *location)
+struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
+                                     struct btrfs_key *location,
+                                     bool check_ref)
 {
         struct btrfs_root *root;
         int ret;
@@ -1586,7 +1587,7 @@ struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
 again:
         root = btrfs_lookup_fs_root(fs_info, location->objectid);
         if (root) {
-                if (btrfs_root_refs(&root->root_item) == 0)
+                if (check_ref && btrfs_root_refs(&root->root_item) == 0)
                         return ERR_PTR(-ENOENT);
                 return root;
         }
@@ -1595,7 +1596,7 @@ again:
         if (IS_ERR(root))
                 return root;
 
-        if (btrfs_root_refs(&root->root_item) == 0) {
+        if (check_ref && btrfs_root_refs(&root->root_item) == 0) {
                 ret = -ENOENT;
                 goto fail;
         }
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index b71acd6e1e5b..5ce2a7da8b11 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -68,8 +68,17 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
 int btrfs_init_fs_root(struct btrfs_root *root);
 int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
                          struct btrfs_root *root);
-struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
-                                              struct btrfs_key *location);
+
+struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
+                                     struct btrfs_key *key,
+                                     bool check_ref);
+static inline struct btrfs_root *
+btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
+                           struct btrfs_key *location)
+{
+        return btrfs_get_fs_root(fs_info, location, true);
+}
+
 int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
 void btrfs_btree_balance_dirty(struct btrfs_root *root);
 void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c09a40db53db..51731b76900d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -145,8 +145,16 @@ int __init extent_io_init(void)
                                      offsetof(struct btrfs_io_bio, bio));
         if (!btrfs_bioset)
                 goto free_buffer_cache;
+
+        if (bioset_integrity_create(btrfs_bioset, BIO_POOL_SIZE))
+                goto free_bioset;
+
         return 0;
 
+free_bioset:
+        bioset_free(btrfs_bioset);
+        btrfs_bioset = NULL;
+
 free_buffer_cache:
         kmem_cache_destroy(extent_buffer_cache);
         extent_buffer_cache = NULL;
@@ -1482,10 +1490,8 @@ static noinline u64 find_delalloc_range(struct extent_io_tree *tree,
                 cur_start = state->end + 1;
                 node = rb_next(node);
                 total_bytes += state->end - state->start + 1;
-                if (total_bytes >= max_bytes) {
-                        *end = *start + max_bytes - 1;
+                if (total_bytes >= max_bytes)
                         break;
-                }
                 if (!node)
                         break;
         }
@@ -1614,7 +1620,7 @@ again:
                 *start = delalloc_start;
                 *end = delalloc_end;
                 free_extent_state(cached_state);
-                return found;
+                return 0;
         }
 
         /*
@@ -1627,10 +1633,9 @@ again:
 
         /*
          * make sure to limit the number of pages we try to lock down
-         * if we're looping.
          */
-        if (delalloc_end + 1 - delalloc_start > max_bytes && loops)
-                delalloc_end = delalloc_start + PAGE_CACHE_SIZE - 1;
+        if (delalloc_end + 1 - delalloc_start > max_bytes)
+                delalloc_end = delalloc_start + max_bytes - 1;
 
         /* step two, lock all the pages after the page that has start */
         ret = lock_delalloc_pages(inode, locked_page,
@@ -1641,8 +1646,7 @@ again:
                  */
                 free_extent_state(cached_state);
                 if (!loops) {
-                        unsigned long offset = (*start) & (PAGE_CACHE_SIZE - 1);
-                        max_bytes = PAGE_CACHE_SIZE - offset;
+                        max_bytes = PAGE_CACHE_SIZE;
                         loops = 1;
                         goto again;
                 } else {
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 22ebc13b6c99..b0ef7b07b1b3 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7986,7 +7986,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 
         /* check for collisions, even if the  name isn't there */
-        ret = btrfs_check_dir_item_collision(root, new_dir->i_ino,
+        ret = btrfs_check_dir_item_collision(dest, new_dir->i_ino,
                              new_dentry->d_name.name,
                              new_dentry->d_name.len);
 
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index a5a26320503f..4a355726151e 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -588,7 +588,7 @@ static struct btrfs_root *read_fs_root(struct btrfs_fs_info *fs_info,
         else
                 key.offset = (u64)-1;
 
-        return btrfs_read_fs_root_no_name(fs_info, &key);
+        return btrfs_get_fs_root(fs_info, &key, false);
 }
 
 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 0b1f4ef8db98..ec71ea44d2b4 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -299,11 +299,6 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
                         continue;
                 }
 
-                if (btrfs_root_refs(&root->root_item) == 0) {
-                        btrfs_add_dead_root(root);
-                        continue;
-                }
-
                 err = btrfs_init_fs_root(root);
                 if (err) {
                         btrfs_free_fs_root(root);
@@ -318,6 +313,9 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
                         btrfs_free_fs_root(root);
                         break;
                 }
+
+                if (btrfs_root_refs(&root->root_item) == 0)
+                        btrfs_add_dead_root(root);
         }
 
         btrfs_free_path(path);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index e7a95356df83..8c81bdc1ef9b 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1838,11 +1838,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
         assert_qgroups_uptodate(trans);
         update_super_roots(root);
 
-        if (!root->fs_info->log_root_recovering) {
-                btrfs_set_super_log_root(root->fs_info->super_copy, 0);
-                btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
-        }
-
+        btrfs_set_super_log_root(root->fs_info->super_copy, 0);
+        btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
         memcpy(root->fs_info->super_for_commit, root->fs_info->super_copy,
                sizeof(*root->fs_info->super_copy));
 
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index a10645830223..043b215769c2 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1716,6 +1716,7 @@ void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
                                  struct btrfs_device *srcdev)
 {
         WARN_ON(!mutex_is_locked(&fs_info->fs_devices->device_list_mutex));
+
         list_del_rcu(&srcdev->dev_list);
         list_del_rcu(&srcdev->dev_alloc_list);
         fs_info->fs_devices->num_devices--;
@@ -1725,9 +1726,13 @@ void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
         }
         if (srcdev->can_discard)
                 fs_info->fs_devices->num_can_discard--;
-        if (srcdev->bdev)
+        if (srcdev->bdev) {
                 fs_info->fs_devices->open_devices--;
 
+                /* zero out the old super */
+                btrfs_scratch_superblock(srcdev);
+        }
+
         call_rcu(&srcdev->rcu, free_device);
 }